Inverse Nanocomposites Based on Indium Tin Oxide for Display Applications: Improved Electrical Conductivity via Polymer Addition
Inverse Nanocomposites Based on Indium Tin Oxide for Display Applications: Improved Electrical Conductivity via Polymer Addition
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DOI：
10.1021/acsanm.9b00191
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发表时间：
2019-04-01
影响因子：
5.9
通讯作者：
Hartwig, Andreas
中科院分区：
文献类型：
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作者：
Hoffmann, Ron;Baric, Valentin;Hartwig, Andreas
本工作提出了一种制备导电纳米颗粒-聚合物复合膜的新方法。这些膜旨在应用于显示器中。提出了在有机聚合物基质中的纳米颗粒的薄层。首先，制备具有高孔隙率的纳米颗粒支架。随后，用单体渗透，最终聚合。所形成的复合材料被称为反相纳米复合材料，因为连续的纳米颗粒支架首先形成，并且在整个过程中主要被保留。将从火焰喷雾热解（FSP）获得的氧化铟锡（ITO）纳米颗粒层压到基板上。这些多孔支架使用液体1，6-己二醇二丙烯酸酯（HDDA）作为单体渗透。在由毛细管力引起的液体吸入期间颗粒网络的重构导致在添加绝缘有机单体时电导率增加。在HDDA填充的纳米颗粒膜的UV固化后实现了电导率的进一步甚至更强的增加，这可以通过聚合期间有机相的收缩力来解释。用这种新方法，可以生产几乎与纯ITO涂层的导电性的光电应用的导电薄膜。
A new method for the preparation of electrically conductive nanoparticle-polymer composite (NPC) films is shown in this work. These films are intended to be applied in displays. Thin layers of percolating nanoparticles in an organic polymer matrix are presented. First, a nanoparticle scaffold with high porosity is prepared. Subsequently, it is infiltrated with a monomer, which is finally polymerized. The formed composite is called an inverse nanocomposite, as the continuous percolating nanoparticle scaffold is formed first and mainly preserved during the whole process. Indium tin oxide (ITO) nanoparticles obtained from flame spray pyrolysis (FSP) are laminated onto a substrate. These porous scaffolds are infiltrated using liquid 1,6-hexanediol diacrylate (HDDA) as monomer. Restructuring of the particle network during the liquid imbibition caused by capillary forces leads to an increased electrical conductivity upon addition of the insulating organic monomer. A further and even stronger increase in the electrical conductivity was achieved after UV-curing of the HDDA-filled nanoparticle films, which is explained by the shrinkage forces of the organic phase during polymerization. With this new method, electrically conductive thin films for optoelectronical applications with almost the conductivity of pure ITO coatings can be produced.